Locomotive buffer-beam.



Patented Apr. I7, |900.

J. F. DUNN. LDCIOMTIVEA BUFFER BEAM.

(Application l-ed Apr. S1B99.1

(No Model.)

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PATENT LoooMoTlvE BUFFER-BEAM.

SPECIFICATION forming part of Letters Patent No. 647,919, dated April 17, 190.

Application tiled April 3, 1899. Serial No. 711,499. (No model.)

T0 @ZZ whom t may concern:

Be it known that I, JAMES F. DUNN, of Salt Lake City, in the county of Salt Lake and State of Utah, have invented a new and Improved Locomotive Buffer-Beam, oflwhich the followingis a full, clear,and exact description.

This invention relates to a locomotive buffer-beam involving certain improvements by which it is possible to construct the beam of rolled-steel plate, thus producing a beam strong and durable in every respect and at the same time light and inexpensive.

-A maiirpurpose of this construction is effectually to protect the boiler-front, cylinderheads, and other vital parts of the locomotive in case of collision.

This specification isthe disclosure oftwo forms of the invention, while the claims define the actual scope thereof.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure l is a plan view of one form of the invention. Fig. 2 is a front elevation of the same. Fig. 3 is a section on the line 3 3 of Fig. 2. Fig. 4 is a section on the line 4 4 of Fig. 2. Fig. 5 is a section on the line 5 5 of Fig. 2. Fig. G is a plan view of the second form of the invention, and Fig. 7 is a front elevation thereof.

The form of the invention shown in Figs. l to 5 is constructed of an unbroken top Wall a, formed of rolled, flanged, or pressed steel, with a downwardlyextending peripheral flange a. Unbroken front and back walls b, also formed of rolled or pressed steel, are riveted to the iange d. back walls h and within the beam a number of cast-metal webs c and c3 are mounted and riveted to the front and back walls to form a rigid structure. The webs c are located, respectively,'at the side frames f, and the web c3 is located at the middle of the beams and is of greater depth than the webs c. The greatest buffingstress on the beam is borne at these points, and such stress is therefore properly met. This is especially so with respect to the webs c, which transmit the strain directly to the side frames of the locomotive. It will be observed that certain of these bolts c and spools c2 are situated directly adjacent to the side Between the front andV frames, so as to transmit to these elements the stress at the points named. Such points bear the greatest bufiin g stress,and by this arrangement I provide a beam which is well adapted to resist the stress imposed upon it. It is further to be seen that the beam, being of rolled or pressed steel, is practically indestructible and effectually protects the boilerfront and cylinder-heads and other vital parts of the locomotive, so that in cases of collision the colliding engine will not crash through the boiler and injure the parts referred to. At each end of the beam a short bottoni wall d is arranged, such walls having downwardlyextending edge iianges d riveted to the side walls b the same as the flanges a are riveted to the side walls. At points intermediate the ends it is not necessary to provide a bottoni Wall, since the webs c will serve to sufficiently vstrengthen the beam. Lugs e are riveted to the engine frame-beamf, and the beam is also provided with downwardly-projecting lugs g, riveted in place to carry the heel 7L of the pilot. bolted to the front face of the beam, as shown in Fig. 4. The diagonal boiler-braces lo are bolted to the top of the buffer-beam, as shown. Figs. 6 and 7 illustrate a construction of the beam in which the webs shown in Figs. l to 5 are dispensed with and in which the beam is provided with a continuous top wall a2 and a continuous bottom wall di, each having downwardly-projected flanges riveted to the continuous front and back walls b2. The engine frame-beams f are bolted to the rear wall b2 of the buiferbeam,and the buffer-beam is also provided with downwardly-projecting flanges g.-,riveted in place and serving to carry the heel of the pilot. For the purpose of strengthening the walls of the beams against each other in place of the webs employed in the form of the invention first disclosed I provide the various bolts c with spools c2, which bear against the faces of the walls, and thus .prevent the collapse of the beam.

Having thus described my invention, I claim as new and desire to secure by Letters Patentf l. A locomotive buffer-beam, having an unbroken top wall of rolled or pressed steel, unbroken front and back walls also of rolled or The cap t' of the pilot is adapted to be IOO pressed steel, the front and back Walls being riveted to the top Wall, Webs secured Within the beam between the front and back Walls to prevent the collapse of the beam, and two rolled or pressed steel plates respectively at the ends of the beam and at the bottom thereof and riveted to the front and back Walls.

2. A locomotive buer-beam, formed of rolled or pressed steel and attached to the front ends of the locomotive side frames, and means for internally strengthening the beam, such means being situated directly adjacent to the respective side frames to transmit to said frames the greatest bufng stress on the beam.

3. A locomotive buier-beam, formed of rolled or pressed steel and provided with three cast-metal Webs situated interiorly, the middle of such Webs being of greater depth than the end Webs and the end Webs being respectively seated directly in front of the side frames of the locomotive.

JAMES F. DUNN. Witnesses:

JNO. M. RITTER, ISAAC B. OWENS. 

